thank you for your questions! here we go:
How far will these light bulbs be from the Arduino?
Will they be next to each other, or widely spaced from each other, or…?
Or, asking from a different tack: does it make more sense to power all three lamps from on MOSFET, or would one MOSFET per lamp be the way to go?
I need to power them on and dimm them separately. I think I’m going to need one mosfet per lamp.
I’m assuming that 800mA specification is the sum of currents from all three lamps. Correct me if I’m wrong.
Well, it’s an filamente bulb and in the box says 4,5V 0,8A. I asume that what it will take when fully bright.
Any chance they can be run in series? Like from a 4.5 * 3 = 13.5V power source [or even a 12V power source]?
Not sure…because I’m innexperienced with this. But since I need to operate them separately I think they cannot be in series…but…not sure. What do you think?
Can they be “ground switched”? Or must they be switched from the “High-Side”? I.e. the MOSFET on the ground side of the lamp, vs the positive power side?
These are filament bulbs, correct?
Yes they are filament bulbs. Not sure to understand the difference between ground and high-side switched. If I can turn them on/off and dimm them from the arduino I don’t have any preference But again, newbie here and not sure.
And, knowing the actual application would, probably, avoid the need for such lists of questions
That’s the fun part. I’m attaching an image of an early prototipe the contraption I need to wire. Whe the star button is pressed, the lights will start a cycle of on/off/dimming like a game and one of them will be finally on revealing (using a servo) whats behind the cup.